I wasn't referring to its use within the medical context. Diamorhpine or heroine is often used, so is cocaine etc. Im talking about chronic (no pun intended) misuse. Cancer prevention? Perhaps, but unfortunately virtually all marijuana when smoked, is smoked with tobacco. Which....well kind of defeats the purpose.Read up on smoking and neutrophil chemotaxis, I've studied immunology at university. You haven't cited a single SCIENTIFIC JOURNAL. (Such as Cochrane systematic reviews, British Medical Journal / Nature...) You have quoted magazines with scientific names.Human brain physiology is a series of complex neurotransmitter interactions, substances like THC will affect that. Same for anti-depressants, messing with serotonin will inhibit the mechanism of "falling in love" for example.I am not anti-legalisation, I am anti-*****. Weed has pros and cons, and all this one sided "weed has no side effects" is *****. Take the good with the bad and be honest. You made it sound like a panacea.